It's illogical to be Kamui , unless he teleported himself , and changed his burned clothes.
You ignored my second line , didn't you ?
The Databook follows the manga , which contradict itself because as it progresses , many new things get revealed.,and other things get approved to be wrong ,
that Databook page was published before the appearance of Izanagi ,also , it will be illogical to consider that Kamui saved Obito from the black flames , when his clother weren't burned , on top of that , He have a lab with many eyes , he won't have a problem switching the eye he used for Izanagi.